diff --git a/addons/website/models/__init__.py b/addons/website/models/__init__.py
index 4977118e925..818f943a8f6 100644
--- a/addons/website/models/__init__.py
+++ b/addons/website/models/__init__.py
@@ -3,3 +3,4 @@
 import ir_fields
 import view
 import website
+import ir_rule
diff --git a/addons/website/models/ir_rule.py b/addons/website/models/ir_rule.py
new file mode 100644
index 00000000000..dcb56795173
--- /dev/null
+++ b/addons/website/models/ir_rule.py
@@ -0,0 +1,25 @@
+# -*- coding: utf-8 -*-
+
+from openerp.osv import osv
+from openerp.addons.web.http import request
+from openerp.tools.misc import unquote as unquote
+
+
+class ir_rule(osv.osv):
+    _inherit = 'ir.rule'
+
+    def _eval_context_for_combinations(self):
+        """Returns a dictionary to use as evaluation context for
+           ir.rule domains, when the goal is to obtain python lists
+           that are easier to parse and combine, but not to
+           actually execute them."""
+        res = super(ir_rule, self)._eval_context_for_combinations()
+        res.update(session=unquote('session'))
+        return res
+
+    def _eval_context(self, cr, uid):
+        """Returns a dictionary to use as evaluation context for
+           ir.rule domains."""
+        res = super(ir_rule, self)._eval_context(cr, uid)
+        res.update(session=request and request.httprequest and request.httprequest.session)
+        return res